/**
 * @Author lzc
 * @Date 2022/5/25 9:11
 */
public class Demo1 {
    public static void main(String[] args) {
//        System.out.println(1-0.9==0.1);
//        System.out.println(1-0.1==0.9);
//        System.out.println(1 - 0.9);
//        System.out.println(1 - 0.1);
        
//        int i = 1/0;
        System.out.println(1.0/0);
        System.out.println(0.0/0 == 0.0/0);
        // NaN
        
    }
}
